Electrical Characteristics for Bridged-Mode Operation (Notes 3, 13) (Continued)
The following specifications apply for VDD= 5V unless otherwise specified. Limits apply for TA= 25˚C.
Symbol
Parameter
Conditions
LM4867
Typical Limit
Units
(Limits)
(Note 14) (Note 15)
THD+N Total Harmonic Distortion+Noise 20Hz ≤ f ≤ 20kHz, AVD = 2
LM4867MTE, RL = 4Ω, PO = 2W
0.3
0.3
0.3
%
%
%
LM4867LQ, RL = 4Ω, PO = 2W
LM4867, RL = 8Ω, PO = 1W
PSRR
Power Supply Rejection Ratio
VDD = 5V, VRIPPLE = 200 mVRMS, RL = 8Ω,
67
dB
CB = 2.2µF
XTALK
SNR
Channel Separation
f = 1 kHz, CB = 2.2µF
80
97
dB
dB
Signal To Noise Ratio
VDD = 5V, PO = 1.1W, RL = 8Ω
Electrical Characteristics for Single-Ended Operation (Notes 3, 13)
The following specifications apply for VDD= 5V unless otherwise specified. Limits apply for TA= 25˚C.
Symbol
Parameter
Conditions
LM4867
Units
(Limits)
Typical
Limit
(Note 15)
50
(Note 14)
VOS
PO
Output Offset Voltage
Output Power
VIN = 0V
5
mV (max)
mW (min)
mW
THD = 0.5%, f = 1kHz, RL = 32Ω
85
75
THD+N = 1%, f = 1kHz, RL = 8Ω (Note
180
20)
THD+N = 1%, f = 1kHz, RL = 16Ω
THD+N = 10%, f = 1kHz, RL = 32Ω
THD+N = 10%, f = 1kHz, RL = 16Ω
THD+N = 10%, f = 1kHz, RL = 32Ω
165
88
208
114
mW
mW
mW
mW
VOUT
Output Voltage Swing
THD = 0.05%, RL = 5kΩ
1
VP-P
%
THD+N
Total Harmonic Distortion+Noise
AV = −1, PO = 75mW, 20 Hz ≤ f ≤ 20kHz,
RL = 32Ω
0.2
PSRR
Power Supply Rejection Ratio
CB = 2.2µF, VRIPPLE = 200mVRMS
f = 1kHz
,
52
dB
XTALK
SNR
Channel Separation
f = 1kHz, CB = 2.2µF
60
94
dB
dB
Signal To Noise Ratio
VDD = 5V, PO = 340mW, RL = 8Ω
Note 3: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device operates within the Operating Ratings. Specifications are not guaranteed for parameters where
no limit is given. The typical value however, is a good indication of device performance.
Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
, θ , and the ambient temperature T . The maximum
JA A
JMAX
allowable power dissipation is P
= (T
− T )/θ . For the LM4867, T
= 150˚C. For the θ s for different packages, please see the Application
DMAX
JMAX
A
JA
JMAX
JA
Information section or the Absolute Maximum Ratings section.
Note 5: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 6: Machine model, 220 pF–240 pF discharged through all pins.
2
Note 7: The given θ is for an LM4867 packaged in an MXA20A with the Exposed-DAP soldered to an exposed 2in area of 1oz printed circuit board copper.
JA
2
Note 8: The given θ is for an LM4867 packaged in an MXA20A with the Exposed-DAP soldered to an exposed 1in area of 1oz printed circuit board copper.
JA
Note 9: The given θ is for an LM4867 packaged in an MXA20A with the Exposed-DAP not soldered to printed circuit board copper.
JA
2
Note 10: The given θ is for an LM4867 packaged in an LQA24A with the Exposed-DAP soldered to an exposed 2in area of 1oz printed circuit board copper.
JA
2
Note 11: The given θ is for an LM4867 packaged in an LQA24A with the Exposed-DAP soldered to an exposed 1in area of 1oz printed circuit board copper.
JA
Note 12: The given θ is for an LM4867 packaged in an LQA24A with the Exposed-DAP not soldered to printed circuit board copper.
JA
Note 13: All voltages are measured with respect to the ground (GND) pins, unless otherwise specified.
Note 14: Typicals are measured at 25˚C and represent the parametric norm.
Note 15: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level). Datasheet min/max specification limits are guaranteed by design, test, or
statistical analysis.
Note 16: The quiescent power supply current depends on the offset voltage when a practical load is connected to the amplifier.
Note 17: Output power is measured at the device terminals.
Note 18: When driving 3Ω loads from a 5V supply, the LM4867LQ, LM4867MTE, or LM4867MTE-1 must be mounted to the circuit board and forced-air cooled (450
linear-feet per minute).
Note 19: When driving 4Ω loads from a 5V supply, the LM4867LQ, LM4867MTE or LM4867MTE-1 must be mounted to the circuit board.
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